Do you want to request a feature or report a bug?

bug

What is the current behavior?

In some cases, when source code does stuff with built-in globals like Object, Array, etc. it appears that those built-in globals are not the same as the globals available in the test environment.

If the current behavior is a bug, please provide the steps to reproduce and if possible a minimal repository on GitHub that we can npm install and npm test.

Still working on figuring out a reliable way to reproduce this in an isolated environment... Stand by...

What is the expected behavior?

The globals should be the same in both environments

Run Jest again with --debug and provide the full configuration it prints. Please mention your node and npm version and operating system.

forthcoming...